GENERAL SPECIFICATIONS: Speaker type 80 mm / 3.15” SQ midrange speaker Nominal impedance 4 ohms Frequency Response 150 Hz – 15 kHz Basket type Multipiece machined aluminum Cone material High-Tech Kevlar® Motor High-grade Neodymium Voice coil diameter 20 mm / 0.79” Max. excursion (p2p)- Xmax 7 mm / 0.28“ Power handling (RMS) 70 Watts Power handling (max) 110 Watts Outer diameter 93,8 mm / 3.69” Mounting diameter 76,5 mm / 3.01” Mounting depth 42 mm / 1.65” PARAMETERS: Resonance frequency – fs 127 Hz Efficiency – SPL 88 dB DC voice coil resistance – Re 3.5 ohms Driver´s Q (nonelectrical losses only) – Qms 6.76 Driver´s Q (at fs) – Qes 0.43 Total driver´s Q – Qts 0.40 Air vol. compliant to driver´s suspension – Vas 0.9 L Moving mass incl. acoustic load – Mms 3.15 g Product of magnetic flux density – BL 4.52 N/A Mech. resistance of driver´s suspension – Rms 0.37 kg/s Compliance of driver´s suspension – Cms 0.50 mm/N Voice coil inductance – LE 0.04 mH FEATURES: Ultra-high-end 80 mm / 3.15” midrange speaker Tightly tolerated technical parameters High-Tech Kevlar® cone Linear moving NBR surround High-grade neodymium motor with copper cup Vented voice coil former reducing distortion Round CCAW wire voice coil increasing highest efficiency Fine-blasted, black anodized GZ-design basket from machined aluminum parts Optimized motor and voice coil ventilation Airflow-optimized aluminum cast spokes Gold plated terminals Documented final technical inspection Wooden box packaging / in matching pairs NRG protection grills with aluminum ring